Information Office Program
Michael J. Liszewski
Information Office Program Manager
Phone: 928.556.7458
E-mail: mjliszew@usgs.gov
Data Storage
The GCMRC utilizes over 7 Terabytes (Tbytes) of on-line disk storage. This disk storage is provided by multiple servers with Small Computer System Interface (SCSI) disk arrays. Servers at the GCMRC are configured with Redundant Array of Independent (or Inexpensive) Drives (RAID). GCMRC utilizes RAID 5 hot-swap disk arrays whenever possible. Server disk arrays are configured to be hot swappable with raid 5 to minimize downtime.
Primary and secondary power supplies for each array are wired to separate Uninterruptible Power Supplies (UPS’s) to provide redundancy and extend uptime during a power failure. This enables systems administration to perform a safe shut down in the event of a power outage. If this was not in place, data would be corrupted or lost during power fluctuations and outages due to server crashes.
GCMRC also utilizes Networked Attached Storage (NAS) devices. These devices are Integrated Drive Electronics (IDE) drives connected to a SCSI backplane. NAS units are used to provide bulk storage capacity at less expense than standard SCSI arrays. These drive arrays contain the repository of all digital and electronic data from GCMRC.